Brake



Sept. 26, 1933- w. J. ANDRES ET AL.

BRAKE Filed May 31, 1930 INVENTOR. WILLIAM J. ANDRES CLARENCE E. WARD BY ATTORNEY Patented Sept. 26, 1933 UNITED STATES BRAKE William J. Andres and Clarence E. Ward, South Bend, Ind., assignors to Bendix Aviation Corporation, South Bend, lnd., a corporation Delaware Application May 31, 1930. Serial no. 458,483

" Claims. (oral-'5) This invention relates to levers and more particularly to levers adapted to operate brakes.

A major object of'the invention is to provide a lever comprising a single stamping.

An important object of the invention is to provide a lever comprising a single stamping having great strength and rigidity. V

A further object of the invention is to provide an operatinglever in which the amount of re- 0 quired machine operation during manufacture shall be materially reduced.

Still a further object of the invention is to provide an operating lever comprising a single stamping which possesses advantages of superiority over levers of similar character in that it is rigid yet light and simple in structure and its manufacture may be economically facilitated.

A salient feature of the invention is a lever comprising a single stamping formed and bent upon itself to provide a sleeve which may be easily and quickly attached to an operating shaft.

An important feature of the invention is the particular structure of the sleeve portion of the lever and of the force applying end of the lever.

Other objects and features of the invention will appear from the following description taken in connection with the drawings, which form a part of this specification, and in which:

Figure 1 is a side elevation of the lever,

Figure 2 is a view illustrating the lever rotated ninety degrees from the position shown in Figure 1,

Figure 3 is a plan view of a stamping from which the lever is formed,

Figure 4 is a side elevation of a modified form of the lever,

Figure 5 illustrates the lever shown in Figure 4 rotated forty-five degrees,

Figure 6 is a plan View of a stamping from which the lever illustrating Figure 4 is formed, and t Figure '7 is a sectional view substantially on line '77, Figure l.

Referring to the drawing for more specific details of the invention, 10 represents a stamping, the central portion of which has parallel edges 11 between which is swaged a rib 12. Positioned in the stamping at each end ofthe rib is an aperture 13 and immediately adjacent the aperture the metal is swaged to provide a sleeve 14.

The ends of the blank are offset as indicated at 15 and the extreme end portions are positioned in a plane parallel to a plane through the center of the body portion. These end portions are cupped and are somewhat wider than the body portion. V

The respective endsare formed to provide a suitable socket for the attachment of a force applying means. As shown, oneof the ends is swaged to provide a socket 16 having'an opening 1'? and the other end is formed to provide a shoulder. 18 having an aperture 19.

After stamping the blank in the form illustrated in Figure 3 the blank is placed on a mandrel and bent upon itself. In this "deformation of the blank, the apertures 13.regis ter to receive a bolt 20 for clamping the lever in position and the apertures 17 and 19 in the respective ends also register to provide a suitable seat and attaching means for the force applying means.

It is to be observed that by the increased width of the offset portions, thereis provided on each side of the lever immediately adjacent the sleeve a slot 21 providing means for adjustment of'the lever to an operating shaft.

It is also to be observed that by reason of the swaged portion 16 in one end of the blank and the shoulder 18 on the other, there is provided a 80, socket for the reception of the force applying means. As shown, the edges of the offset portion and the respective ends are welded together as indicated at 22.to provide a hollow crank arm of great strength and rigidity.

Figures 4, 5 and 6 illustrate a modification of the invention. This modification differs only in details of structure of the crank arm. Asshown, the blank is stamped to provide a central portion 30 having parallel side edges 31 and a central rib 32 at the respective ends of which are apertures 33 and 34 and the edges defining the apertures are swaged to provide sleeves 35 and 36. The respective ends are offset as shown at 3'7 and are provided with apertures 38 and 39. These end por- 'tions are cupped as indicated at 40, the object of which will hereinafter appear. This stamping is deformed on a mandrel to provide a sleeve 41.

In deforming the blank,'the apertures 33 and 34 and the apertures 38 and 39 are brought to register for the reception of a clamping'bolt 42 and an attaching means, not shown. Ifv desired, the force applying end of the lever may be strengthened by reinforcing plates 43, but this is by no 7 means essential.

In this modification, as well as in the preferred form, thegeneral contour of the stamping is such that when the blank is deformed on a mandrel to produce the sleeve, there is formed a suitable slot which permits olamping of the sleeve 110 to secure by Letters Patent is:

1. A lever arm comprising two sections engag-fl ing eachother lengthwise of said arm, and which are formed with parts jointly providing a transverse cylindrical opening extending'crosswise be-.

tween said sections at the end of the arm and adapted to embrace a shaft and with other aligned parts adjacent said opening on the side opposite the said end of the arm and forming between said sections a slot communicating with said opening, and a clamping bolt extending through said slot.

2. A lever arm comprising two integrallyconnected sections engaging each other lengthwise of said arm, and which are formed with parts jointly providing a transverse cylindrical. open-' ing extending crosswise between said sections at the end of the arm and adapted to embrace a shaft and with other aligned parts-adjacent said opening on the side opposite the said end of thearm and forming between said sections a slot com- :engaging the spaced parallel portions and arranged to draw them together to contract the loopedportion about the shaft.

4. Operating means for a shaft comprising, in combination, a sheet metal arm including a portion looped about the shaft and extended to form a double thickness portion integral with the looped portion, having parallel spaced portions, and .a clamping member engaging the spaced parallel portions and arranged to draw them together to contract the looped portion about the shaft.

5. Operating means for. a shaft comprising, in combination, a sheet metal arm includinga portion looped about the shaft and extended to form a double thickness portion integral with the looped portion, said doublethickness portion comprising two channeled sections having their edges for a part only of the length contacting with each other, and a clamping member engaging the sections and arranged 'to draw them' together to contact the looped portions about the shaft.

WILLIAM J ANDRES. CLARENCE E. WARD. 

